Kate Walsh Dr. Addison Montgomery Actor Tim Daly Dr. Pete Wilder Actor Audra McDonald Dr. Naomi Bennett Actor Paul Adelstein Dr. Cooper Freedman Actor Kadee Strickland Dr. Charlotte King Actor Christopher Lowell William "Dell" Parker Actor Taye Diggs Dr. Sam Bennett Actor Amy Brenneman Dr. Violet Turner Actor David Sutcliffe Officer Kevin Nelson Guest Star Brian Benben Dr. Sheldon Wallace Guest Star Grant Show Dr. Archer Forbes Montgomery Guest Star Josh Hopkins Dr. Noah Barnes Guest Star Jayne Brook Dr. Meg Porter Guest Star Amanda Detmer Morgan Gellman Guest Star Sharon Leal Sonya Nichols Guest Star GeffriMaya Maya Bennett Guest Star Agnes Bruckner Heather Parker Guest Star Jay Harrington Dr. Wyatt Lockhart Guest Star Hailey Sole Betsey Parker Guest Star Jeffrey Doornbos Matt Guest Star Shonda Rhimes Executive Producer, Writer Betsy Beers Executive Producer Marti Noxon Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer, Director Jon Cowan Writer Craig Turk Writer Ayanna Floyd Writer Lauren Schmidt Hissrich Writer Mike Ostrowski Writer Steve Blackman Writer Sal Calleros Writer Elizabeth Klaviter Writer Robert Rovner Writer Michael Zinberg Director Tom Verica Director James Frawley Director Debora Cahn Writer